You need to connect modem >router>computers. You will need a modem that has an ethernet port. A wireless router. A wireless G or N router, and you will need a compatible wireless G or N wireless adapter. You can either buy a wireless pci adapter that will go inside of your Dim 4300 or you can purchase a USB wireless adapter. Your Studio already has a wireless adapter installed. I would recommend Linksys and Netgear. But there are other mfrs if needed. Just buy the same mfr wireless adapter as the router.